Influence of boric acid on the hydrolysis rate of a hydroxy Schiff base.

スポンサーリンク

概要

• 論文の詳細を見る

• Effects of boric acid on the rate of hydrolysis of a Schiff base derived from α-hydroxyisobutyrophenone and 2-methoxyethylamine were examined in the pH range 4.2–10.4 at 30 °C. The rate increased above pH 7 but decreased below pH 7 with increasing borate concentration following a saturation curve. This is consistent with a reaction sequence involving a preequilibrium formation of a borate–substrate complex followed by its rate-determining decay to the hydrolysis products. The formation constant of the complex showed a bellshaped change with pH but the rate constant for the complex decay was constant above pH 7, a small change being observed at lower pH. A mechanism involving an intramolecular transfer of the boron-coordinated hydroxide ion to the imine carbon within the complex is presented. Hydrazone formation from the hydroxy ketone was also examined in the presence of boric acid.

• 公益社団法人 日本化学会の論文

著者

• Fueno Takayuki

  Faculty Of Engineering Science Osaka University

• Okuyama Tadashi

  Faculty Of Engineering Science Osaka University

• MATSUDA Hiroshi

  Faculty of Veterinary Clinic, Department of Agriculture, Tokyo University of Agriculture and Technol

• Nagamatsu Hiroaki

  Faculty of Engineering Science, Osaka University

• Matsuda Hiroshi

  Faculty of Engineering Science, Osaka University

関連論文

• Reactions of 2,2-Dialkylvinyl Iodonium Salt with Halide Ions
• Solvolysis of 2, 2-Dialkylvinyl Iodonium Salt : Alkyl Participation and Possibility of a Primary Vinylic Cation Intermediate
• Novel Acid-Catalyzed Rearrangement of Alkoxycarbonylcycloheptatriene Assisted by Alkoxy Substitution
• A Four-Band Hubbard Model for Doped CuO_5 and Related Clusters. Populations of Holes on Apex Oxygens Determined by the Full VB CI Method
• A Two-Band Hubbard Model for Clusters of Doped Copper Oxides and Other Metal Oxides: Populations of Holes and Spin Densities by the Full VB CI Method
• Extended Hubbard Models for Transition Metal Oxides and Halides: Importance of Spin and Charge Fluctuations in Charge Transfer Metals : Electrical Properties of Condensed Matter
• Rates of Oxygen Isotope Exchange and Ring Opening of Cyclic Sulfinate Esters
• Solvolysis of Optically Active 4-Methylcyclohexylidenemethyl Triflate: Evidence against a Primary Vinyl Cation as an Intermediate
• Possible Organic Analogues to Copper Oxides: Applications of a J-Model : Electrical Properties of Condensed Matter
• Ab initio MO Studies of the Hole Delocalization in Copper Oxides and Related Species: Necessity of the Extended Hubbard Model : Electrical Properties of Condensed Matter
• Ab initio MO Studies on the Correlation and Spin Correlation Effects for Copper-Oxygen and Copper-Halogen Bonds in High-T_c Copper Oxide Superconductors
• Ab Initio MO Calculations of Effective Exchange Integrals between Transition-Metal Ions via Oxygen Dianions : Nature of the Copper-Oxygen Bonds and Superconductivity
• Ring-Opening Reactions of Cyclic Sufinate Esters with a Phenolic Leaving Group
• Buffer Effects on the Ring Opening of Cyclic Sulfinate Esters as Evidence for the Hypervalent Intermediate^1
• Buffer Catalysis of the Hydrolysis of Phenyl and Methyl Benzenesulfinates. Contrasting Behavior between Acyclic and Cyclic Analog
• IL-12 is produced by antigen-presenting cells stimulated with soluble αβ TCR and restores impairced T_h1 responses
• Flash Photolytic Generation of a Dithio Carbocation from 1,3-Dithiolane Derivatives and Its Reaction with Nucleophiles.
• Structure and Reactivity of α,β-Unsaturated Ethers. XI. Cationic Copolymerization and Acetal Addition of cis- and trans-Sthyl Ethyl Ethers
• Structure and Reactivity of α,β-Unsaturated Ethers. XII. Cationic Copolymerization of Ring-Substituted Styryl Ethyl Ethers
• Reactions of thiols with phenylglyoxal to give thiomandelic S-esters. Formation of hemithioacetals and their rearrangement.
• Photosolvolysis of 2-alkoxy-2-phenyl-1,3-dithiolane.
• Salt effects on the intramolecular Cannizzaro reaction of phenylglyoxal. Specific acceleration by calcium ion.
• Acid-catalyzed hydrolysis of methoxymethyl phenyl sulfoxide without concomitant racemization.
• Influence of boric acid on the hydrolysis rate of a hydroxy Schiff base.

もっと見る 閉じる

スポンサーリンク